How to tell them apart
ないで attaches to a verb and means doing something without doing the verb first, or softens a request not to do it (買わないでおきました, 帰らないで下さい). なくて is the て form of ない itself, so it links a negative state or action as a cause or reason for what follows (分からなくて困りました). Swapping them is wrong because ないで cannot express cause, and なくて cannot mean without doing.
- ないで Use ないで when you mean without doing an action or when asking someone not to do something.
- なくて Use なくて when the negative state or action is the cause or reason for what comes next.
| Grammar point | Meaning | JLPT level |
|---|---|---|
| ないで naide | Not doing something; a request or command not to do | N4 |
| なくて nakute | Negative te-form used to give a cause or reason | N4 |
ないで naide
Not doing something; a request or command not to do
ないで expresses doing something without doing another action, and it is often used to ask or tell someone not to do something. It attaches to the nai form of a verb, as in 言わないで, 動かないで and しないで, with ください added for a polite request in ないでください. It is not used with nouns or i adjectives, and learners should keep it separate from なくて, which links states or reasons rather than requests.
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これは親には言わないで下さい。
Please don't tell this to your parents.
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グズグズしてないでさっさと行動しろ！
Quit lazing around and get moving!
なくて nakute
Negative te-form used to give a cause or reason
なくて expresses a negative reason or cause, meaning because something did not happen or was not a certain way. It is made by changing the negative ない ending to なくて, as in 来なくて, 高くなくて, and なくて after nouns expressing lack. The なくて clause comes first, followed by the result, feeling, or apology, as in 出せなくてすいません.
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早くメールが出せなくてすいません。
I'm sorry I couldn't write to you sooner.
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宿題が分からなくて、先生に聞いた。
I didn't understand the homework, so I asked the teacher.
ないで and なくて are both JLPT N4 grammar points that Japanese learners often mix up. This page compares them side by side on meanings, usage and example sentences, so you can tell them apart.